Twenty years since Saif Ali Khan and Rani Mukerji first popped the big pop culture question: Why are boys and girls not like each other? The gender banter that played out beautifully as two strangers met, parted ways, and eventually fell in love cemented Hum Tum as one of the most important rom-coms of the last two decades. On the film’s 20th anniversary, filmmaker Kunal Kohli revisits the making of the film, which changed the genre’s grammar in Hindi cinema.